Fatal error: Uncaught Error: Object of class stdClass could not be converted to string in /home/httpd/vhosts/gujan-gartenbau.ch/httpdocs/wp-includes/functions.php:5581
Stack trace:
#0 /home/httpd/vhosts/gujan-gartenbau.ch/httpdocs/wp-includes/functions.php(5581): ob_end_flush()
#1 /home/httpd/vhosts/gujan-gartenbau.ch/httpdocs/wp-includes/class-wp-hook.php(353): wp_ob_end_flush_all('')
#2 /home/httpd/vhosts/gujan-gartenbau.ch/httpdocs/wp-includes/class-wp-hook.php(377): WP_Hook->apply_filters('', Array)
#3 /home/httpd/vhosts/gujan-gartenbau.ch/httpdocs/wp-includes/plugin.php(523): WP_Hook->do_action(Array)
#4 /home/httpd/vhosts/gujan-gartenbau.ch/httpdocs/wp-includes/load.php(1308): do_action('shutdown')
#5 [internal function]: shutdown_action_hook()
#6 {main}
  thrown in /home/httpd/vhosts/gujan-gartenbau.ch/httpdocs/wp-includes/functions.php on line 5581